Use the Whole Pumpkin
Cooking squash and (pie) pumpkins can be used in both sweet and savory recipes. The only difference between those and jack-o-lantern pumpkins is that the latter are bred for their size, shape, and outward appearance. You can eat a jack-o-lantern, but it will not have the depth of flavor of other winter eating squash. You can also use sweeter pie pumpkins in savory recipes (think sweet potato) as well as savory squash in sweet recipes, like pie, because you are adding sugar.